# Decode-and-Forward Relaying Systems with Nth Best-Relay Selection over Rayleigh Fading Channels

• Duy, Tran Trung (Department of Electronic Engineering, University of Ulsan) ;
• Kong, Hyung-Yun (Department of Electronic Engineering, University of Ulsan)
• 투고 : 2011.11.02
• 심사 : 2012.01.13
• 발행 : 2012.03.31
• 110 8

#### 초록

In this paper, we evaluate performances of dual-hop decode-and-forward relaying systems with the $N^{th}$ best-relay selection scheme. In some schemes, such as scheduling or load balancing schemes, the best relay is unavailable and hence the system must resort the second best, third best, or generally the $N^{th}$ best relay. We derive the expressions of the outage probability and symbol error rate (SER) for this scenario over Rayleigh fading channels. Monte-Carlo simulations are presented to verify the analytical results.

#### 키워드

Cooperative Communication;Decode-and-Forward Relaying;Outage Probability;Rayleigh Fading Channel

#### 과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF)

#### 참고문헌

1. J. N. Laneman, G. W. Wornell, "Distributed spacetime- coded protocols for exploiting cooperative diversity in wireless networks," IEEE Trans. on Inform. Theory, vol. 49, no. 10, pp. 2415-2425, 2003. https://doi.org/10.1109/TIT.2003.817829
2. J. N. Laneman, D. N. C Tse, and G. W. Wornell, "Cooperative diversity in wireless networks: Efficient protocols and outage behavior," IEEE Trans. on Inform. Theory, vol. 50, no. 12, pp. 3062-3080, Dec. 2004. https://doi.org/10.1109/TIT.2004.838089
3. F. Xu, C. M. L. Francis, and D. W. Yue, "Diversity order for amplify-and-forward dual-hop systems with fixed-gain relay under Nakagami fading channels," IEEE Trans. on Wire. Commun., vol. 9, no. 1, Jan. 2010.
4. D. B. da Costa, S. Aissa, "Amplify-and-forward relaying in channel-noise-assisted cooperative networks with relay selection," IEEE Commun. Letters, vol. 14, no. 7, Jul. 2010.
5. T. Q. Duong, V. N. Q. Bao, "Performance analysis of selection decode-and-forward relay networks," IEEE Electronics Letter, vol. 44, no. 20, pp. 1206-1207, Sep. 2008. https://doi.org/10.1049/el:20081952
6. H. Chen, J. Liu, L. Zheng, C. Zhai, and Y. Zhou, "Approximate SEP analysis for DF cooperative networks with opportunistic relaying," IEEE Signal Processing Letters, vol. 17, no. 9, 2010.
7. S. S. Ikki, M. H. Ahmed, "On the performance of adaptive decode-and-forward cooperative diversity with the $N^{th}$ best-relay selection scheme," in Proc. of IEEE Global Communication Conference, pp. 1-6, Nov. 2009.
8. S. S. Ikki, M. H. Ahmed, "On the performance of amplify-and-forward cooperative diversity with the nth best-relay selection scheme," in Proc. of IEEE International Conference on Communication, pp. 1-6, Jun. 2009.
9. J. Proakis, Digital Communication, Fourth Edition, New York: McGraw Hill, 2001.
10. M. K. Simon, Digital Communication over Fading Channels, Second Edition, John Wiley & Sons, Inc., Hoboken, New Jersey, 2005.

#### 피인용 문헌

1. Efficient relay selection scheme using regenerative and degenerative protocols for 5th generation WiMAX systems vol.69, pp.5, 2015, https://doi.org/10.1016/j.aeue.2014.07.016